In a food-chain, the saprophytic organisms are
producers
consumers
predators
decomposers
Correct Answer :
D. decomposers
Related Questions
Some animals have a constant high body temperature. This is because
they like this temperature
they can work fast in the temperature
they prefer to live in cold region
they are active animals
Desert animals are called
arboreal
cursorial
benthos
xeric
A pond is
a biome
a natural ecosystem
an artificial ecosystem
a community of plants and animals
Association of a sea-anemone with hermit crab living in a gastropod shell is an example of
mutualism
commensalism
symbiosis
parasitism
When compared to the trophic level above, the total energy present in any given trophic level is necessarily
greater
lesser
the same
very small
The first fish that eats upon the planktonic form is
carnivore
primary consumer
secondary consumer
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Animals which live at the bottom of the sea are called
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benthic
pelagic
none of these
Which is the correct sequence in a food-chain
Grass > Wolf �Deer -^Buffalo
Grass � Snake �Insect �Deer
Grass -�Insect >Birds >Snake
Bacteria ->Grass ~>Rabbit -�Wolf
Soil particles are arranged in order of increasing size are
sand, silt and clay
silt, sand and clay
clay, sand and silt
clay, silt and sand
Which one is the direct ecological factor ?
Soil structure
Wind
Temperature
Climate
Smog is a combination of
air and water
water and smoke
smoke and fog
fire and water
The whale is
primary producer
carnivorous secondary consumer
herbivorous
a decomposers
The transitional zone where two different types of communities meet is called the
Ecotype
Littoral
Ecotone
Both and
A food-chain consists of
producer only
producers and consumers
consumers only
decomposers only
The total interacting animals and plants in any well defined area which as field or a pond is known as
biosphere
biome
community
ecosystem
Which of the following is normally not an important atmospheric pollutant
CO
Hydro-carbon
Biome is
a part of the earth and its atmosphere which inhabits livings organisms
a community of organisms interacting with each other
the fauna and flora on land
the fauna and flora on ocean
The energy storage of consumer level is called
gross primary productivity
net primary productivity
secondary productivity
none of these
Which of the following is an anti-forest conservation activity ?
Economy in timbering
Clear falling of trees
Prevention of fibres
Preservation of wild animals
Gas liberated in Bhopal gas tragedy was
methyl isocyanide
phenyl isocyanide
ethylene
acetylene
Birth rate under ideal conditions is known as
mortality
natality
both and
none of these
Species that occur in different geographical regions separated by special barriers are
Allopatric
Autogenic
Sympatric
Allogenic
Acid rain is
limited to industrial areas
presence of large quantity of SO^2 in the atmosphere
a natural phenomenon
presence of CO^2 in the atmosphere
In a food-chain, the saprophytic organisms are
producers
consumers
predators
decomposers
The total set of feeding relationships in a biotic community is called
a food chain
trophic levels
food webs
ecosystem
Strontium- 90 can cause
lung diseases
bone cancer
leukaemia
skin cancer
In an ecosystem the population of
primary producers is larger than that of primary consumers
secondary consumers is the largest because they are most powerful
primary consumers is the least dependent upon primary producers.
primary consumers outnumber primary producers
When a big fish eats a small fish, which eats water fleas supported by phyto-plankton, the water-fleas are
producers
primary consumers
secondary consumers
top consumers in the food-chain
Animals in cold regions have fur because
hair is a good insulating material
hairs trap air which acts as insulator
they like fur
none of these
Which of the following atmospheric pollutants is not produced by the exhaust of motor vehicles in Delhi
Fly ash
Hydrocarbon gases
CO